.rm{
    width: 76px;
    position: fixed;
    bottom: 65px;
    right: 0;
    z-index: 999;
    
}
.rm-item{
    height: 75px;
    display: block;
    color: #757575;
    text-align: center;
    border: 1px solid #f5f5f5;
    border-top: none;
    background: #fff;
    position: relative;
}
.rm-item:first-child,
.rm-to-top{
    border-top: 1px solid #f5f5f5;
}
.rm-item .iconfont{
    display: block;
    font-size: 30px;
    padding-top: 10px;
}
.rm-to-top{
    margin-top: 15px;
}
/* 弹出框 */
.rm-item-mention{
    width: 120px;
    border: 1px solid #f5f5f5;
    position: absolute;
    right: 83px;
    top: 0;
    padding: 10px;
    background: #fff;
    display: none;
}
.rm-item-mention img{
    width: 100px;
    height: 100px;
    display: block;
    margin-bottom: 20px;
}
.rm-item-mention p{
    color: #757575;
}
.rm-item-mention::before{
    position: absolute;
    content: "";
    width: 10px;
    height: 10px;
    border-right: 1px solid #f5f5f5;
    border-top: 1px solid #f5f5f5;
    display: block;
    transform: rotate(45deg);
    top: 20px;
    right: -6px;
    background: #fff;
}
.rm-item:hover .rm-item-mention{
    display: block;
}